33.0.0

Integrate dotnet/fsharp from 48f932c to 0859851. Notable changes include:

• allowing '_' as a self-identifier
• events for FSI evaluation lifecycle events
• enhancements to FSI return-values
• fixed parsing for langversion CLI arguments
• allow cancellation of FSI interactions
• ToString fixes for value options
• Fixes for code generation in autogenerated members for very large records
• make ranges of member declarations capture the entire member
• improve error recovery in the parser
• improve logic for auto-detecting framework assemblies for FSI

Packages can be found at Nuget.